No, nipping is not ok.
With both nipping and jumping, don't just turn around, leave him. Don't even say anything, leave him and close a door after you if necessary.
He's getting attention, and like a naughty child, attention, positive or negative, is rewarding to him.
Also start training a "down" ( not when he's acting out). Get treats and a good solid down. This will be useful in redirecting behavior.
How much exercise is he getting? Just letting outside doesn't count.
Like they say, " a tired pup is a good pup."
Up his mental exercise. Hide a treat or favorite and teach him to find it.
These dogs need lots of mental and physical exercise. It's well worth the time and effort.
Nothing is as simple as it seems or as complicated as we make it~
Attitude is everything -- Pick a good one!
Sofie AKA Ussina vom Haus Brezel
Jack von Jagenstadt
Tatty - Burmese bad cat