Someone very tall and thin, may not always be meant as an insult as being lanky could be seen as a compliment to some. However many may take it as an insult so try to use other words to describe height/appearance.
"Omgkatie, you're so lanky"
"You're so thin and lanky"
a guy with no style or grace. he has a funny face, he can handstand when he needs to and stretch his arms out just for you. he can inflate himself just like a balloon.