The movie poster is a fish costume over a guys head
A guy steals his brother's car and with his two friends make a road trip to get laid by a girl he met online..

The movie sounds like "Sex Drive", but I couldn't find a poster like that. There is this one:

Sex Drive Movie Poster Print Style B Online at All Movie Replicas (http://www.allmoviereplicas.com/Sex-Drive-Movie-Poster-Print-Style-B.html)

Sex drive