A pet peeve of mine is "drug" when used as the past tense of drag.
I hate this, but is it legitimate US vs UK practice? We do handle verbs differently - it's common in the UK to have 'leant', 'learnt', 'spelt', 'dreamt' etc, as the past tense of those verbs, although the 'leaned', 'learned', 'spelled' and 'dreamed' forms are gaining ground.
The one that really has my teeth grinding is the use of 'shined' as the past tense of shine. In the UK at least, it's 'shone'.