It's when you have your face buried in your girls pussy!
I had my tongue so far in her I was neck deep.
di neck deep 26 marzo 2011
1 more definition
The word is used in the workplace to refer to too many tasks given with too little time to accomplish them.
Paperworks are neckdeep, I may not be able to finish it on time.
di hardpen 03 ottobre 2010