I'm English & play an American shard, just about everything that gets said sounds weird.
Though usually it's not the phrase its that they said it in such a lazy half-assed manner that it meant the exact opposite of what they intended: "I could care less."
During arguments when someone says "Thought so/what I thought." When the last thing you said was something that insulted them but they were too busy trying to type fast to see it.
"My bad"... aside from being nonsense, usually used to excuse an epic f up without actually apologizing. Where an apology would leave the impression: "Thats cool" & "My bad" leaves the impression: "What an idiot."
"I hear ya."... You were meant to, I was speaking aloud, and to you. =/
"Potty break"... Children use pottys, adults use toilets. (Not that we really need to know either way)
"OJ's"... New vent reference to faction enemies, I know it's handy to have a short way of referring to them but OJ = Orange Juice. (Or OJ Simpson... & hes never on!)