You're off the hook — I finished the report myself.
off the hook
idiom B2
Relieved of a duty, burden, responsibility, or pressure.
Origin
The phrase "off the hook" primarily means being freed from blame, responsibility, or trouble. Its origins trace back to a few different concepts, most notably the mid-19th-century metaphor of a fish or worm freeing itself from a fishing hook, which allowed it to escape. The idiom's meaning has evolved and branched out over time:
Fishing (1800s): Just as a fish wriggles off a hook to avoid being caught, getting "off the hook" came to mean a person has avoided a difficult situation, obligation, or punishment.
Early telephones (early 1900s): In the days of early candlestick phones and rotary dialers, placing the receiver onto a physical cradle "hook" completed the circuit to hang up. Taking the receiver "off the hook" meant the phone was busy or could not receive calls, and people looking to avoid being bothered would intentionally leave the phone off the hook.
Modern slang (1990s–present): In late-20th-century slang — particularly within American hip-hop and youth culture — the phrase expanded to mean something that is wild, incredibly exciting, or exceptionally good (e.g., "that concert was off the hook").
The meeting was cancelled, so I'm off the hook and can go home early.
When his colleague unexpectedly volunteered to lead the presentation, he was off the hook, and the knot of anxiety in his chest finally loosened.