魚釣りに行く

go fishing

→ 魚釣り
phrase Uncommon #16,741
go fishing 魚釣り means fishing, and に行く means go to do something. The phrase is in the plain form; polite forms include 魚釣りに行きます. Related forms include 魚釣りに行った (went fishing) and 魚釣りに行きませんか (would you like to go fishing?).
JA: 一緒に魚釣りに行く?
EN: Do you want to go fishing together?

雨が降っていなければ魚釣りに行くのに

If it weren't raining, I'd go fishing.

魚釣りに行くよりも家にいたい

I’d rather stay home than go fishing.

私たちは時々魚釣りに行く

We go fishing sometimes.

今度の日曜日に私と魚釣りに行くのを忘れないでね

Don’t forget to go fishing with me this coming Sunday.