Every now and then, I've been known to say, "I'm [expletive deleted] awesome!"
I knew a kid in High School who would say "That's Gangster!" which I assume meant "cool".
I dated a girl in college who said "nifty" a lot. When I confronted her about it later, she claimed she never used that word and that it must have been me.
My ex would always say, "Don't make fun of me" just because someone giggled at something she said or did. Of course, she was laughing too.
When my dad is left home alone, he always shouts "Me time!" If there's something to be done during the day and it's already past 4:30, my dad always "you/I/we can do it tomorrow." And if we cave, he says, "I win."

My family also has some real-life memes. After a Christmas gift turned out to be more for my dad than my mom to whom he had given it (a "bank" skull with a helmet emblazoned with a swastika). Since then, gifts that were more for the giver than the receiver were called "Nazi Skull Helmets" which I always picked at for being grammatically incorrect although to say it correctly, I think you'd need a longer sentence. A few months ago, I also told my dad by phone that I was feeling "anxious" because they were coming home and I'd hardly gotten any writing done using my computer which is why I wanted to stay home. Instead I'd wasted time on Deviant Art checking character genderbends... dork. Ever since, my dad shouts "Anxiety Level Rising" whenever someone comes home and there's a person on the computer who knows they'll have to give it up since they had it all day.

My dad does not just say "I don't know" when asked a question. One time in particular, my mom was frantic about having misplaced a lot of money (like $300), my dad said, "Don't jump to conclusions. Maybe I took it, I don't know." He actually said this... that maybe he took it and yet somehow he still doesn't know. Does that sound reassuring to you? My mom said she had to be sure and my dad said it wasn't important. Eventually my mom did remember where she put it so my dad wasn't lying about anything, he's just really... blank.