Stands for "For Crying Out Loud", The original phrase being popularized by the television show Stargate. Common to online first-person shooters. Intended to parody other acronyms such as FFS.
InternetNitwit1: "FFS, leran to play ur classnoob!"
OtherPlayer:"FCOL".
Something or someone that is at high risk of foolish actions or ideas being brought upon them and cannot become rid of such actions or ideas, no matter the nature of foolishness; antonym of foolproof.
The foolprone plan that Jake created to talk to Sandy suffered many setbacks, as less-than-intelligent people often interfered with his strategy of approaching her.
Ex. This guy took me out to a great dinner last night and when i went to repay him, orally, i got folped. I hate it when a guy think he can just fart on me while i am sucking his dick. I mean, I do have standards.