an accent (~) placed over Spanish n when pronounced ny (as in señor ) or Portuguese a or o when nasalized (as in São Paulo ), or over a vowel in phonetic transcription, indicating nasalization.
the tilde symbol as a part of a URL.
a symbol similar to a tilde used in mathematics to indicate similarity, and in logic to indicate negation.
Funny, but I used to NOT HATE those things. I can't imagine what happened.