swim in (something)
1. Literally, to immerse oneself in a body of water and swim in it. We went swimming in the lake out back every day during the summer.
2. By extension, to be totally covered with or submerged in some liquid. There were a few measly strawberries swimming in cream, so it wasn't much of a dessert.
3. To have or experience a plenitude or overabundance of something. Don't worry about your cousins, their parents are swimming in money. You don't need any more toys—you and your sister are positively swimming in them.
See also: swim
swimming in something
Fig. having lots of something. Right now we are swimming in merchandise. In a month it will be gone. The Wilmington-Thorpes are just swimming in money.
See also: swimming