To boil over

to run over the top of a vessel, as liquid when thrown into violent agitation by heat or other cause of effervescence; to be excited with ardor or passion so as to lose self-control.
See under Boil, v. i.

See also: Boil, Over

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Gareth Rees and Kaneria were also involved in a slanging match which threatened to boil over before Glamorgan captain Jamie Dalrymple, Wright and Sharp intervened.
The England all-rounder was warned by umpire Steve Bucknor to keep the lid on his sledging of former Lancashire team-mate Ganguly as the match threatened to boil over.
DARREN GOUGH allowed his frustrations to boil over today under the hot sun as England struggled to contain the Colts XI during their re-arranged one-day match.