To move around annoyingly while close to others as a result of boredom, physical discomfort or simply youth. Typically occurs from a supine position, and most often in sleeping bags. Example: Meredith's constant fonching during the Norweigan bell-ringers' performance was driving her mother to the brink of sanity.
FONCH
Meaning of FONCH in English
Slang English vocab. Английский сленговый словарь. 2012