- n. m.1. 'Belly', stomach. S'en mettre plein le sac: To 'stuff one's face', to have a hearty meal.2. Unit of ten francs or ten-franc note. (Prior to the 1958 remonetization, the amount was 1000 francs. According to certain sources inflation in the mid-yos resulted in an upgrading of the sac to 100 nouveaux francs.)3. Etre au sac (also: avoir le sac): To be 'stinking rich', to be 'rolling in it', to be very wealthy. (Expressions such as épouser un sac: to marry a wealthy girl, and terms like gros sac: wealthy so-and-so, confirm the money image of this meaning of the word.)4. Faire son sac: To 'make one's pile', to amass a fortune.5. L'affaire est dans le sac!a It's in the bag! — It's a dead-cert! — It's a sure thing!b (iron.): She's preggers! — She is pregnant.6. Avoir son sac: To 'have had a skinful', to be drunk. (The boozing image is further illustrated in the term sac à vin: 'wino', dipsomaniac.)7. Etre fichu comme un sac:a (of person): To be 'dressed like a guy', to be frumpily attired.b (of work, plans, etc.): To be in a right old mcss, in total disarray.8. Vider son Sac: To 'get something off one's chest', to speak onc's mind.9. Mettez ça dans votre sac!a Keep it under your hat! — Keep this to yourself! — Don't mention this to anyone!b Put that in your pipe and smoke it! — Accept that fact if you can! (There's littlc else you can do!)10. Travailler le sac (Boxing): To have a workout with the punchbag.11. Mettre dans le meme sac (fig.): To 'tar with the same brush', to 'lump together', to judge in the same manner.12. Avoir la tête dans le sac: To be completely out of funds, to be near to financial ruin.13. Cracher dans le sac: To be guillotined (also: cracher dans le son).14. Sac à malice(s): 'Tricky customer', cunning so- and-so (character who always seems to have something left in his bag of tricks).15. Sac d'embrouilles: Inextricably jumbled issue or situation (literally a tangled web. Also: sac de næuds).16. Sac à viande (joc.): Sleeping-bag.17. Sac d'os: 'Bag of bones', skinny person. Quel sac d'os! I've seen more meat on a butcher's pencil!
Dictionary of Modern Colloquial French. 2013.