Verb: alph, alph-ing, alph-ed
The derivation of extreme sexual pleasure from the act of vandalising "Alpha Course" signs by removing, or otherwise obscuring, the end "a", changing it to a word with sexual connotations.
Q: What did you do last night?
A: I was out Alph-ing my local church.
Q: Urgh, you disgusting pervert!
A: Yes, I hate myself.