The act of masturbating to My Little Ponyporn, a term usually used by the brony fandom.
Person 1: *fap fap fap fap fap fap*
Person 2: hey what's going on he-JESUS CHRIST ARE THOSE HORSES?! WHAT THE FUCK?!
Person 1: Uh... um.... I was just, er.... clopping?
Person 2: ...I appreciate the honesty but still what the fuck.