Definition from Wiktionary, the free dictionary
Etymology 1 
Probably imitatory; compare frig.
- (archaic) To rub, chafe.
- 1761: You might have rumpled and crumpled, and doubled and creased, and fretted and fridged the outsides of them all to pieces — Laurence Sterne, The Life & Opinions of Tristram Shandy, Gentleman, vol. III (Penguin 2003, p. 145)
See also 
Etymology 2 
Abbreviation of refrigerator
Alternative forms 
fridge (plural fridges)
- A refrigerator.
refrigerator — see refrigerator