That awkward feeling you get when a guy or girl tries too hard to come onto you. Usually caused by excessive unreturned flirting, messaging, or facebook status comments.
The following is a sequence of events
Text Conversation
Guy: Hey girl, want to come chill at my place tonight?
Girl: Can't. I have plans.
Guy: It's cool. Maybe tomorrow.
(No Response)
(Later that night)
Girl: Posts attractive facebook picture.
Guy: OMG <3 <3
(Even Later)
Girl: Post a status saying "Had an amazing time with the girls tonighttt! :) :)"
Guy: posts a comment saying "Wish I was there <3"
At this point the girl should be feeling major Turtle Neck Tension(TNT).
Example Sentence: That guy was giving me so much TNT last night!