Im in the search for some funny songs to play at my acoustic.
I´m so tired of the songs i repeat all the time like stairway, diary of a madman
classical gas etc.

Best regards to you all!
try "F*** you softly " by tenacious d. not really FP'd but has some elements to it.
secret song on dookie (greenday) - "all by myself" you could master it in about 2 minutes.

some not so funny that are fairly uncommon
laid to rest - the showdown
going to california - zeppelin (this ones pretty hard though, at least for me)

theres a ton of threads for FP songs. just do a search and see what comes up.