massive gill

If somebody has got 'gill' with another person, it is because they are annoyed or upset with them. 'Massive gill' is a superlative of 'gill'. Two people who have 'massive gill' are often arguing and generally do not get on. The term is often said by a third person listening into the conversation and said in a comedic tone.

Two people that have got 'Gill' with each other, for some reason or another are angry or annoyed with each other, often resulting from a disagreement. Normally said by a third party listening in on the argument, in a comedic tone.
''Massive Gill'' is an extreme version of ''Gill''