[KyleGoetz]

Originally Posted by allhailhata

“let the grounder go through one's legs”
トンネルエラー
YouTube - 1996年　ダイエー守備陣のダブルトンネルエラー
ファーストとセカンドがトンネルした。
traditionally more used as a baseball term than as a computer one.

I'd like to point out that the link I gave above to ALC gives an example of tunneling through a firewall.