Artist and painter Martin Mull exclaims, "Oh, my God." 00:15:45:xx and again at 00:15:47:xx as expressions of amazement.
A quote from Tim Jenison, the Tim of the title, appears onscreen around timestamp 34'20" using the "f-word" as an intensifier to express the strength of his desire for the project to succeed. The quote remains onscreen for about 8 seconds.
Alcohol, Drugs & Smoking
Mild
English painter and author David Hockney OM CH RA is seen smoking a cigarette in two scenes, once while driving in a car with Tim Jenison (the eponymous Tim of the film's title) beginning around 00:38:29:?? and again with Tim and Professor Philip Steadman when Tim unveils his painting for them around 01:12:36:??.