Proverbs 1:31 New English Translation

³¹Therefore^[a] they will eat from the fruit^[b] of their way,^[c]
and they will be stuffed full^[d] of their own counsel.

Proverbs 1:31 tn The vav (ו) prefixed to the verb וְיֹאכְלוּ (v^eyoʾkh^elu) functions in a consecutive logical sense: “therefore.”
Proverbs 1:31 sn The expression “eat the fruit of” is a figurative expression (hypocatastasis) that compares the consequences of sin to agricultural growth that culminates in produce. They will suffer the consequences of their sinful actions, that is, they will “reap” what they “sow.”
Proverbs 1:31 sn The words “way” (דֶּרֶךְ, derekh) and “counsel” (מוֹעֵצָה, moʿetsah) stand in strong contrast to the instruction of wisdom which gave counsel and rebuke to encourage a better way. They will bear the consequences of the course they follow and the advice they take (for that wrong advice, e.g., Ps 1:1).
Proverbs 1:31 tn Heb “to eat to one’s fill.” The verb שָׂבֵעַ (saveaʿ) means (1) positive: “to eat one’s fill” so that one’s appetite is satisfied and (2) negative: “to eat in excess” as a glutton to the point of sickness and revulsion (BDB 959 s.v.). Fools will not only “eat” the fruit of their own way (v. 31a), they will be force-fed this revolting “menu” which will make them want to vomit (v. 31b) and eventually kill them (v. 32).

New English Translation (NET)