"Inertia Creeps" is a song by the trip hop group Massive Attack, released as a single on 21 September 1998. It is the fourth and final single released off their third album Mezzanine, and is the tenth single overall.

It is the least commercially successful of the four singles released from Mezzanine, charting only on the New Zealand Singles Chart at no. 16.

The song describes a relationship that Robert del Naja had, which at the time had just ended:

I already had a lot of the lyrics written before. It was just about a relationship I had been going through. It's about being in a situation but knowing you should be out of it but you're too fucking lazy or weak to leave. And you're dishonest to yourself and dishonest to the other person. You're betraying them everyday [sic] and the whole scene feels like it's closing in on you, d'ya-know-what-I-mean? The idea is a combination of movements propelling yourself forward and pulling yourself back at the same time. That's what the track's about—a fucked up relationship basically and there it is.

The rhythm of "Inertia Creeps" has a strong çiftetelli influence, inspired by nights out in Istanbul. Robert del Naja acquired some tapes of such music, which were used as a basis for the song. The song is composed in the key of D-sharp minor and it runs at a tempo of 84 beats per minute. It samples the song "ROckWrok" by New Wave band Ultravox.

The music video for "Inertia Creeps" features Robert del Naja sitting on a sofa. He is watching an explicit clip of his partner having sex with what appears to be Mushroom. The clip is directed and recorded by Daddy G, who is in the same room as the extramarital couple. Del Naja is shown to be frequently shocked by the clip (especially a scene where she performs fellatio on Mushroom whilst sitting in a chair); he breathes heavily while watching it, turns away a lot from the camcorder, fast-forwards a lot of the video, and at one point he ends up hiding behind a blanket.

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