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plot thickens

Things are becoming more complicated or interesting. The police assumed that the woman was murdered by her ex-husband, but he has an alibi. The plot thickens. John is supposed to be going out with Mary, but I saw him last night with Sally. The plot thickens.
See also: plot, thicken

thicken something up

1. to make something, such as a fluid, thicker. I have to thicken this gravy up before we can serve dinner. Please thicken up the gravy before you serve it.
2. to make something wider. See this line here? You need to thicken it up so that it shows more clearly. Try to thicken up the line a little.
See also: thicken, up

the plot thickens

something has become more complicated or interesting The plot thickens as police investigate dozens of deaths at a California hospital.
See also: plot, thicken

The plot thickens.

something that you say when something happens which makes a strange situation even more difficult to understand I had assumed the Irishman who keeps phoning June was her husband, but it seems her husband is American. The plot thickens.
See lose the plot
See also: plot, thicken

plot thickens, the

Circumstances are becoming very complex or mysterious. Today this term is often used ironically or half-humorously, as in His companion wasn't his wife or his partner-the plot thickens. Originally (1671) it described the plot of a play that was overly intricate, and by the late 1800s it was used for increasingly complex mysteries in detective stories.
See also: plot

thicken up

1. To become thicker or denser: The gravy thickened up.
2. To cause something to become thicker or denser: I thickened the batter up by adding more flour. The cook thickened up the fudge.
See also: thicken, up
References in periodicals archive ?
Sugar, in concentrations above a specific level in the cooking liquid, literally hogs the water, and the starch can't get enough to swell and thicken as it cooks.
Applies beautifully, thickens and lengthens the lashes with one coat.
As long as the pattern of currents remains similar to today's, "the response of the ice shelf to a warming of the climate will be for it to thicken, rather than threatening its longevity," he says.
We know of no other mechanism that can produce laminae that progressively thicken and thin on such a regular time interval.
Place the bowl over the hot water and whisk until the mix thickens enough to coat the back of the spoon.
Just get it to 70 degrees and let it sit until it thickens.
New Novethix L-10 polymer thickens and controls the rheology of challenging surfactant cleansing systems such as mild, sulfate/amide-free shampoos and facial cleansers or very low surfactant content formulations for economy markets.
Smoking thickens the lining of the throat, and can lead to throat cancer.
The benzoin causes the tights to stick to the skin, and the shoe then rubs against the tights; some people also believe that benzoin thickens the skin.
Thickens each hair with a volumising complex, including panthenol, wheat protein and PVP-resin.
For example, the extreme southwestern portion of the central ice sheet thickens by some 210 millimeters each year.
The biopolymer is fully biodegradable and thickens the water that is forced into the reservoir to extract the oil.
Add vanilla and 1 1/2 cups whipping cream and beat at medium speed 10 minutes, until mixture thickens.
Stir mixture constantly until chips and butter melt and mixture thickens, 5 to 6 minutes.