DCHP-1 Online
mug-up ((n.)) † [< Brit. dial.] Esp. North 
n. a hot drink, usually accompanied by a light meal or snack.
- 1933 Back at the tent we had a mugup, lashed up and said good-bye to the Indians.
- 1936 They would stop for a "mugup" of tea every little while.
- 1962 "I had to cook--270 meals in addition to the between meal "mug-ups. "
- 1933 Back at the tent we had a mugup, lashed up and said good-bye to the Indians.