Grout Fishing 

Little phrases or sexual invitations written in the grout of bathroom tiles. Usually seen while sitting on the toilet. Mostly used for public sex; sometime a clever turn of phrase.

Bendix didn't have any luck at the party so he went grout fishing at the truck stop.

Grout Fishing by M.A. Ross September 19, 2007

Groupfishing 

Usually used on dating apps, the act of posting mostly group photos so people have to guess which one the person is. Somewhere north of 50% of the time, there is one picture at the end that shows you it's the least attractive (to you) of the group.

I took a chance by right swiping on a profile pic with 5 people in it, but ended up being a groupfishing situation.

Groupfishing by NSHoser July 19, 2022