2 definitions by CRJB

Abbreviation of "Middle Aged Man On The Toot", meaning a man that goes to the pub often and drinks heavily.

Many 40-50 year-old blokes spent much of their youth in pubs. Since that time, many traditional public houses have either closed(1) or been turned into trendy gastro-establishments or brash, loud bars. MAMOTTs are part of a trend where drinkers are returning to their roots, seeking out quieter bars, often with "real ale" offerings, and are starting to rebuild a traditional pub culture.

This trend is increasingly being acknowledged in social science research circles, for example by Dr Lyn Brierley-Jones of Sunderland University where MAMOTTs are perfectly described in the "traditional" drinker classification(2).

References:
(1) According to CAMRA, an average of 31 pubs are closing down every week in the UK
(2) Abstract: Habits of ‘home’ and ‘traditional’ drinking: a qualitative analysis of reported middle class alcohol use
Brierley-Jones, L., Ling, J., McCabe, K. E., Wilson, G. B., Crosland, A., Kaner, E. F. and Haighton, C. A. (2014) Sociology of Health & Illness, 36: 10541076
doi: 10.1111/1467-9566.12145

Related word: MAMIL
This is a good bar, though rather full of MAMOTTs
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A single run in cricket (North American parlance).

In baseball, the hitter simply has to run towards first base. In cricket, the two batters swap ends to complete a run, hence the term flip-flap.
The two English batters put pressure on the Australian fielder by pushing for a quick flip-flap
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