To masturbate creepily, more specifically in a public area.
Derived from Puerto Rican singing sensation Elvis Crespo, who was recently accused of masturbating under an airplane blanket next to a woman on his airplane.
To complete a crespo completely, one should later deny any accusations that follow.
"ca...CABRON que carajos estas haciendo? te stas tirando un crespo
aki mismo a mi lado?"/ "no me acuerdo"
"dude i just pulled a crespo
in lecture today"