trip on

trip on someone or something

 and trip over someone or something
to stumble on someone or something. The place was filled with sleeping people. I tripped over perfect strangers on my way to the door. I tripped on a brick and fell into the wall.
See also: on, trip

trip on

v.
1. To stumble or fall on account of hitting or catching the foot on something: I tripped on the curb and fell down on the sidewalk.
2. Slang To be under the influence of some hallucinogenic drug: He tried to write an essay while he was tripping on acid, and it made no sense at all.
See also: on, trip
References in classic literature ?
Everybody sat on the upper deck, on benches, under an awning; everybody talked, laughed, and exclaimed at the wonder scenery; in truth, a trip on that lake is almost the perfection of pleasuring.
The 6f is likely to take some getting and that is a major negative for a horse who has finished well beaten in two starts over the trip on turf - both on decent ground.