CONCENTRATE, CONCENTRATION
NOUNS
► BRAIN FADE loss of concentration or alertness caused by fatigue, esp. after a long period of driving → 1968 orig. motor racing usage
► BRAIN FOG inability to concentrate, remember, etc. → 1853
► BRAIN FREEZE a lapse of concentration or memory; a mental block → 1988
► BRAIN LOCK a lapse of concentration or memory; a mental block → 1934
VERBS
► CONCENTRICATE to concentrate → 1647 obs.
► SIMMER DOWN ON to concentrate upon, to specialize in; to devote one’s entire attention to → 1933 Amer. dial.
► WAKE YOUR IDEAS UP to concentrate; to use your wits → 1961 UK sl.
► WALK INTO to concentrate on, to approach aggressively → M19 sl.
► ZONE OUT to lose concentration → 1970 sl.
Lexicophilia 