A colloquial Irish saying to express the feeling of being extremely drunk and that the possibility of consuming anymore alcohol could potentially have detrimental effects on ones health.

The phrase must be pronounced with the stress placed on the word "neck".
Andy : "Story man, whats the craic?"

Aidan : "Ah man nothing much, fancy a few shots lad?"

Andy : "Here lad are you well? I am full to the neck"

Aidan "It be funny man com'on"
by Mr. Walnut Plug October 16, 2011
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Sucking dick and swallowing to completion. You don’t just want neck, you want full neck.
Who sucked ya dick better, Rachel or Candy? Rachel braaaaahhh she goes full neck.

She went full neck on me last night and swallowed the load.
by Eaton Holgoode February 5, 2018
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