socked in
adj.— «Yes, it sure was a foggy commute this morning. During the morning broadcast, we used the term “socked in” a lot. This is to let you know where the fog is really dense. It does make you wonder what a sock has to do with fog?» —“Where Does The Term “Socked In” Come From?” by Jenni Hogan KIRO-TV (Seattle, Washington) Dec. 1, 2008. (source: Double-Tongued Dictionary)
Further reading
For at least three centuries, declaring I’ll eat my hat! has indicated that the speaker is so certain they’re right, that if they’re not, they’re willing to swallow their chapeau. Variations of this phrase include I’ll eat my boots, I’ll eat my cap...
The phrase throw in the towel meaning “give up,” stems from boxing competitions in the late 19th. If a boxer’s team wanted to stop the fight—usually because their fighter was taking too much punishment—they would literally throw a towel into the air...