A phrase used to encourage
someone to either be more courageous or put in more effort. It is particularly useful when sarcastically directed towards
someone you do not genuinely want to do
better, though this is not the only use for it.
"That
player just missed his second open lay up! Yo, NUT THE FUCK UP!"
"I really like that
girl over there, but I'm too scared to talk to her..." "
Bro, NUT THE FUCK UP!"